Yup, checked that all out. I usually raise the selling price to the maximum when first establishing a trading post. The caravan usually buys one item then the price turns red. I lower the price until it turns black again. Periodically I check each trading post to make sure that nothing is overpriced. The prices of stuff that the caravans sell to me is only raised if I want to import them.
Oh, well, it seems to work okay, now. It was just odd. I don't see how to reach 150,000 within the alloted time; but that's another problem. Maybe I'm way overproducing tea and the labor cost of that is killing me.
Anyway, thanks for looking into it for me.